I'm allergic to nuts (not peanuts- they're not nuts), but it's rare I'm actually scared to be in a room because of it. It has happened (like at the tapas place that had "walnut dust" as an ingredient in a couple of their dishes), but most of the time I really just need to pay attention to what I ingest, and ask questions about things I'm not sure of. Anaphylaxis sucks a big one, but it's never happened because I was in the same room with nuts.
Nolite te bastardes carborundorum.